Steam-boiler clean-out device



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M.V HUFFMAN STEAM BILER CL'EANLOUT .DEVICE Filed Dec. Lef, 1921 www reunite reti ie, ieee;

Minze Herrin-in, "inns ivroinns, IOWA.

" STEAM-Beinen ernan-ournnvrcn y y application riieanecember 6,1921. .serial No. eedeizf "To "all whom it may concern Beit known thatl, `lvliirii l-lnrrrriii, a ,citizenoi the United States,and a resident of Des Moines, in the county of Polk` and Statefoiloivmliave invented a certain new and useful Steam-Boiler Clean-Out Device,

`oi" which the folloivingis a specification.l` i `My invention relatesto thatclass oi? steam boilerieleaneout devices in which there is 'inserted slightly above the "bottoni Votithe boiler on its" interior 4a pipe having,open`l @510 l have used.thereferenoenurneral to indi,-` cate generallyav steam boiler of the return `:ings `therein `andleading,l to a` point otldisf.

charge `exterior to the boileryand also` a "nieeus whereby the discharge end ofthe pipe i t maybe "opened" so that the steain pressure `within `the boilerivjill cause the niud, sedi-f "nient and scale Within the boiler toybeblown out" throughsaidopenings.` "l y, p y y yobject is to providea `devrcelot the class describedot' s1n'iple,`/durable and ini-ni`` `pensive construction and particularly to provide suchjdevices which maybe readily, `quickly and easily installed ina boiler and after installation Will be firmlyand securely supported in its` position.

'A furthe object 1is ftofprovide `iniproved ineens forprotecting` that part of the discharge pipe Whiehf` extends throngh the boiler and ,the` tire boi;` and through the rear `Wall of the furnace from being burnt out bythe excessiveheat at therear of the lire box."

My' invention teinplated are attained, as hereinafter,more :fully set forth, pointed out in inyclanns, and

"iili'istrated in the accompanying drawings,

in which:` y p y "1 L Figure 1 shows avertical `center sectional (view oia,boilerfofthe return flue type hav-` t thereto. i u i i `Figure Qshovvs; a central"longitudinal sectional view of the cleanout pipe detached.

i y Figures 3 showsa detail sectional vieiv onf a@ me` 3 3 of Fem@ `1, mr i a Figure 4j shows detail "sectionalviev'von` the` line Aff-e eflfigure1.` y, y

`Referring to the accompanying drawings flue type. This boileris provided'at itsiront nearlits bottoni with abend hole 1l. `'lhe rear `furnace Wall '12 is` spaced apart ifi-oni the rear "of the boiler and the even i'laine trein the tire the bottom of the boiler, as" shown in F10 consists in the constructioin` `arrangjlfeinent andl combination ofthe various parts of the "device, whereby the objects: cons improved clean-out device v applied passesfupvvardly betiveen the rear ofthe' boiler and the rear tiues of the boiler. l y v i My improved boiler clean-out device coinpriees a stationary pipe 18 having aseries ivall toenter the'i'eturn y oiz slots 1e at its bottoni extending througl'i-V` i out its length. `This stationaiypipe has rotatively inounted on` it`s`interior appipe 15 'which is provided `withslots 16 arranged spirally, as 'shovvn in Figure 2, so that" when theinner pipe 1s rotated these slots 16" Will euccessively coincide With the slots Mend at other times Willbeutof linewith the slots" i i 14'. I preferably provide on the stationary outerpipel a `Series oflegs or supl'iorts 1T i t to hold the outer pipe properly `spaced ,c c y c y zure e. l i alsopreferably provide on the stat1onary pipe 13 a defleetingliood y, 18` supported y above-the .pipe and having its jedge`s'extended downwardly and Ioutmzardly to stand in position slightly spaced from the `bottom ot' the boiler and thereby directjtbe Q currents ofjvvater so that they Will strike upon bottoni of 'the boiler land tend to` remove any inudor sediinenttliereon when l passing toward the dischargeopeningsof the clean-out pipes. v y ,i y t V For the purpose of applyingthese clean` out pipes to a boiler and irrnlyand accurately securing` them in `position when applied, I have provided` supporting` and couplingdevice cornprisinga body portion 19 preferably made cast steel and i'ornied hollow and `provided at one end Withy anfex ternally screw threaded"tubularfextension E21), f

device 23 is an indicating` niark 24, 1 preifei'f ably formed by having` a raised lugcast in the material. The statiolarypipe 13`is pro-` `vided at itsrear endWith lugsand spaces 25 `designed to tit into `andmcoartwith the luge l21, asshovvn in Figure `1,`and onthe forward end ot' the inner pipe 15 isa screvv ,cap 26dei `signed when screwed into `positionto'hold:`

the inner `pipe againstlforward movement andclose theendof the outerl pipe.

"The "pipe 221 is extei'ided rearwardly l through theY rear ivalloi a furnace andis provided at its rear end with a discharge branch 27 and a valvev controlled by the hand wheel 28 for opening and closing the dis` charge end ot the pipe 22.

Mounted. in and supported by the rear wall 12 is a cooling,` and protecting tube 52S) which stands spaced apart from the pipel Q2 and which is supported at its forward end on the lugs 28. The forward end'o'f this tube 2) is open `andystands only slightly spaced apart from the rear of the boiler. In practical operation Vand assun'iing` that it is desired to apply one oil my improved clean-out devices to a boiler, l first drill an 'opening at'the rear olf lthe boiler and provide it with an internal screwthread. 'l then insert the supporting and coupling device in this screw threaded opening and screw it in very tightly and until the indidating,` mark 24' is directly at the top. I then insert through the `hand hole 11 at the 'front of thev boiler the pipes 13 and 15 and move them rearwardly until the lugs 25 of the outer pipe 13 lit intol the lugs 21 of the part 19. This will insure that the slots it are directly at the bottom of the pipe 123. W hen this'has been done the inner pipe 15 will project vthrough the part 19 and. I then insert a. rod 30 inthe rear end oi the pipe 15 and fix it firmly in position by means of a pin 3l, and this rod extends rearwardly through .the ypipe 22 rand is attached to the hand wheel 32, at therealr `ot 'the pipe 22 thus firmly holding the 'pipes 18 and 15 against forward movement and also providing' means wherebythe inner pipe 15 may be conveniently and easily rotated.

After this has been done the pipe 29 may be placed in position and obviously when the furnace is in operation coolair will beI 4drawnii'i through therear end of the pipe 29 andsurround the pipe 22 and the part 19 and be discharged at the -forward end adjacent to the rear of the boiler, thus cooling' the parts 19 and 22 preventing them from beingburntout. rlilie'eool air will also prevent the pipe 29 from being burnt out.

After the device has been installed as describedthe operator lirst opens the blow-oli` valve 2S and then rotates the inner pipe 15 by means ot' the hand wheel 32 thus successively bringingI the slots 14- and 1G into alineinent with each other and removing the mud, sediment yandscale from the boiler at points adjacent to said slots as they are successively brought vinto alinement.

I claim as my' invention:

1. In a device of the class described., in combination witha `steam boiler of a supporting and couplingV device designed to be permanently iXed in the rear wall of a boiler and provided at its forward end on. the interior of .theboiler with projecting lugs, two pipes, one within the other designed to be inserted in the bottom of the.

boiler and being` provided with openings that may be brought .into alineincnt with cach other, one olf said pipes being proviiiled with notches to receive said lugs and the other oij said pipes.being` capable olt rotation rela-- tive to the l'irst, a pipe connected to the snpportii'lg and coupling` device at the rear end, and means extending` through the said rod, and connected to the rotatable one olf said. pipes ior holding` said rotatable pipe real.'- wardly and for providing;` means whereby the said rotatable pipe may be turned, for the purposes stated.

' 2. ln a device of the class described, in combination of a steam boiler of a supporting` and coupling,- device comprising a. screw threaded extension at one end designed to be screwed into an opening,r in the rear of the boiler and also beingy provided in front of the screw thread with lugs.` said device having` at' its rear an indicating mark to visibly indicate to the operator the position of the lugs on the interior of the boiler, two pipes, one within the other, the inner one being provided with notches to receive the lugs on the supporting and coupling: device, both pipes being provided with openings which may be made to coincide with cach other upon the rotation oli the inner pipe.

the supporting and coupling` device being also provided with outwardly projecting lugs on vthe exterior, a pipe screwed into the interior of the supporting and couplingr device and extending' rearwardly thereironl to a point beyond the end of the furnace, a discharge pipe communicating with the rear of the latter mentioned pipe, and a blow-oil:` valve therein, a rod fixed to the rear end of the inner rotatable pipe and extending to a point in the rear ot the furnace, means for rotating said rod and for holding it against forward movement, 'for the purposes stated.

3. In a device of the class described, in combination of a steam boiler of a supporting and coupling; device comprising a. screw threaded extension at one end designed to be screwed into an openingl in the rear of the boiler and also being provided in front of' the screw thread with lugs, said device haviircY at its rear an indicatiiw niark to visibly indica-te to the operator ille position of the lugs on the interior of the boiler, two pipes, one within the other, the inner one being provided with notches to receive the lugs on the supporting and coupling device, both pipes being,r provided with openings which may be made to coincide with each other upon the rotation of the inner pipe, the supporting' and coupling device being' also provided with outwardly projecting;` lugs on the exterior, a pipe screwed into the yinterior of the supporting:y and coupling device and extending rearwardly therefrom to a point beyond the end of the furnace, a dis- Mmmm mi charge pipe communicating With the rear' open at both ends and supported at its inner of the latter mentioned pipe, and a blow-off end upon thelugs at the rear of the sup- 10 valve therein, a. rocl fixed to the rear end of porting` and coupling device and 11aving its the inner rotatable pipe and extending to inner end slightly spaced from the rear of a point in the rearof the furnace, means for the boiler, for the purposes stated.

' `rotatingv said rod and for holding it against Des Moines, Iowa., Uctoloer 26, 1921.

forward movement, and a cooling pipe insertecl through the rear Wall of a furnace MIKE HUFFMAN. 

